LoginLlama Python Client

Official Python SDK for LoginLlama - AI-powered login security and fraud detection.

Features

• Automatic Context Detection: Auto-detects IP address and User-Agent from Flask, Django, FastAPI, and other frameworks
• Multi-Source IP Extraction: Supports X-Forwarded-For, CF-Connecting-IP, X-Real-IP, True-Client-IP with private IP filtering
• Middleware Support: Drop-in middleware for Flask, Django, and FastAPI
• Type Hints: Fully typed for excellent IDE support
• Webhook Verification: Built-in HMAC signature verification

Installation

pip install loginllama==2.0.0

Or with uv:

uv pip install loginllama==2.0.0

Requires Python 3.10 or higher.

Quick Start

With Middleware (Recommended)

The simplest way to use LoginLlama is with the middleware pattern, which automatically captures request context:

from loginllama import LoginLlama
from flask import Flask, request, jsonify

app = Flask(__name__)
loginllama = LoginLlama(api_token='your-api-key')

# Add middleware to auto-capture request context
@app.before_request
def setup_loginllama():
    loginllama.middleware()()

@app.route('/login', methods=['POST'])
def login():
    try:
        # IP and User-Agent are automatically detected!
        result = loginllama.check(request.form['email'])

        if result.status == 'error' or result.risk_score > 5:
            print(f"Suspicious login blocked: {result.codes}")
            return jsonify({'error': 'Login blocked'}), 403

        # Continue with login...
        return jsonify({'success': True})
    except Exception as error:
        print(f'LoginLlama error: {error}')
        # Fail open on errors
        return jsonify({'success': True})

Without Middleware

If you prefer not to use middleware, you can pass the request explicitly:

result = loginllama.check(
    request.form['email'],
    request=request
)

Or provide IP and User-Agent manually:

result = loginllama.check(
    'user@example.com',
    ip_address='203.0.113.42',
    user_agent='Mozilla/5.0 (Windows NT 10.0; Win64; x64)...'
)

Framework Examples

Flask

from flask import Flask, request, jsonify
from loginllama import LoginLlama

app = Flask(__name__)
loginllama = LoginLlama()  # Uses LOGINLLAMA_API_KEY env var

# Use middleware for automatic detection
@app.before_request
def setup_loginllama():
    loginllama.middleware()()

@app.route('/login', methods=['POST'])
def login():
    result = loginllama.check(
        request.form['email'],
        geo_country='US',
        geo_city='San Francisco'
    )

    if result.risk_score > 5:
        return jsonify({'error': 'Suspicious login'}), 403

    return jsonify({'success': True})

Django

from django.http import JsonResponse
from django.views.decorators.csrf import csrf_exempt
from loginllama import LoginLlama

loginllama = LoginLlama()

@csrf_exempt
def login_view(request):
    if request.method == 'POST':
        email = request.POST.get('email')

        # Pass request explicitly for auto-detection
        result = loginllama.check(email, request=request)

        if result.risk_score > 5:
            return JsonResponse(
                {'error': 'Suspicious login'},
                status=403
            )

        return JsonResponse({'success': True})

    return JsonResponse({'error': 'Method not allowed'}, status=405)

FastAPI

from fastapi import FastAPI, Request, HTTPException
from loginllama import LoginLlama
from pydantic import BaseModel

app = FastAPI()
loginllama = LoginLlama()

class LoginRequest(BaseModel):
    email: str
    password: str

@app.post('/login')
async def login(login_data: LoginRequest, request: Request):
    # Pass request explicitly for auto-detection
    result = loginllama.check(
        login_data.email,
        request=request
    )

    if result.risk_score > 5:
        raise HTTPException(
            status_code=403,
            detail='Suspicious login detected'
        )

    return {'success': True}

API Reference

LoginLlama(api_token=None, base_url=None)

Create a new LoginLlama client.

Parameters:

• api_token (optional): Your API key. Defaults to LOGINLLAMA_API_KEY environment variable
• base_url (optional): Custom API endpoint for testing

from loginllama import LoginLlama

loginllama = LoginLlama(api_token='your-api-key')

loginllama.check(identity_key, **options)

Check a login attempt for suspicious activity.

Parameters:

• identity_key (required): User identifier (email, username, user ID, etc.)
• ip_address (optional): Override auto-detected IP address
• user_agent (optional): Override auto-detected User-Agent
• request (optional): Explicit request object (Flask, Django, FastAPI)
• email_address (optional): User's email address for additional verification
• geo_country (optional): ISO country code (e.g., 'US', 'GB')
• geo_city (optional): City name for additional context
• user_time_of_day (optional): Time of login attempt

Returns: LoginCheck object

class LoginCheck:
    status: str  # 'success' or 'error'
    message: str
    codes: List[LoginCheckStatus]
    risk_score: int  # 0-10 scale
    environment: str
    meta: Optional[dict]

Detection Priority:

1. Explicit ip_address and user_agent keyword arguments
2. Extract from request object if provided
3. Use context from middleware (if used)

Examples:

# Auto-detect from middleware context
result = loginllama.check('user@example.com')

# Pass request explicitly
result = loginllama.check('user@example.com', request=request)

# Manual override
result = loginllama.check(
    'user@example.com',
    ip_address='203.0.113.42',
    user_agent='Mozilla/5.0...'
)

# With additional context
result = loginllama.check(
    'user@example.com',
    email_address='user@example.com',
    geo_country='US',
    geo_city='San Francisco'
)

loginllama.middleware()

Returns middleware function that automatically captures request context using contextvars.

Flask:

@app.before_request
def setup_loginllama():
    loginllama.middleware()()

Django (middleware class):

class LoginLlamaMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response
        self.loginllama = LoginLlama()

    def __call__(self, request):
        self.loginllama.middleware()(request)
        return self.get_response(request)

FastAPI:

@app.middleware("http")
async def loginllama_middleware(request: Request, call_next):
    loginllama.middleware()(request)
    response = await call_next(request)
    return response

verify_webhook_signature(payload, signature, secret)

Verify webhook signature using constant-time HMAC comparison.

Parameters:

• payload: Raw webhook body (bytes or str)
• signature: Value from X-LoginLlama-Signature header
• secret: Webhook secret from LoginLlama dashboard

Returns: bool

from loginllama import verify_webhook_signature
from flask import Flask, request

app = Flask(__name__)

@app.route('/webhook', methods=['POST'])
def webhook():
    payload = request.get_data()
    signature = request.headers.get('X-LoginLlama-Signature')

    if not verify_webhook_signature(payload, signature, os.environ['WEBHOOK_SECRET']):
        return 'Invalid signature', 401

    event = request.get_json()
    # Handle event...
    return 'ok', 200

Login Status Codes

The SDK exports a LoginCheckStatus enum with all possible status codes:

from loginllama import LoginCheckStatus

# Example status codes:
LoginCheckStatus.VALID
LoginCheckStatus.IP_ADDRESS_SUSPICIOUS
LoginCheckStatus.KNOWN_BOT
LoginCheckStatus.IMPOSSIBLE_TRAVEL_DETECTED
LoginCheckStatus.NEW_LOGIN_LOCATION
# ... and more

Error Handling

The SDK will raise exceptions if required parameters are missing:

try:
    result = loginllama.check('user@example.com')
except ValueError as error:
    if 'IP address could not be detected' in str(error):
        # No IP available - pass ip_address or request explicitly
        # or use middleware()
        pass
except Exception as error:
    # Consider failing open on errors to avoid blocking legitimate users
    print(f'LoginLlama error: {error}')

Best Practice: Fail open on errors to avoid blocking legitimate users during API outages:

try:
    result = loginllama.check(email)
    if result.risk_score > 5:
        # Block suspicious login
        return jsonify({'error': 'Login blocked'}), 403
except Exception as error:
    print(f'LoginLlama error: {error}')
    # Fail open - allow login to proceed
    return jsonify({'success': True})

IP Detection

The SDK automatically detects IP addresses from multiple sources with priority fallback:

1. X-Forwarded-For - Parses chain, takes first public IP (filters private IPs)
2. CF-Connecting-IP - Cloudflare real client IP
3. X-Real-IP - nginx proxy header
4. True-Client-IP - Akamai/Cloudflare header
5. Direct connection - REMOTE_ADDR, framework-specific attributes

Private IP Filtering: Automatically filters 10.x.x.x, 172.16-31.x.x, 192.168.x.x, 127.x.x.x, ::1, fc00::/7, fe80::/10

Type Hints

The SDK is fully typed with type hints:

from loginllama import (
    LoginLlama,
    LoginCheck,
    LoginCheckStatus,
    verify_webhook_signature
)

Contributing

Contributions are welcome! Please open an issue or submit a pull request on GitHub.

License

MIT License

Support

• Documentation: loginllama.app/docs
• Dashboard: loginllama.app/dashboard
• Issues: GitHub Issues